正則表達式-獲取小括號內的內容

需求

在開發過程需要獲取字符串中在小括號內的內容，遂記錄一下

實現

import cn.hutool.core.util.ReUtil;

public class RegexTest {

    public static void main(String[] args) {
        String str = "username(zhangsan)";
        String regex = "\\((.*?)\\)";
        String group0 = ReUtil.getGroup0(regex, str);
        String group1 = ReUtil.getGroup1(regex, str);
        System.out.println("group0 = " + group0);
        System.out.println("group1 = " + group1);
    }
}

輸出結果

group0 = (zhangsan)
group1 = zhangsan